Sleep and Wake up:
1. Sleep mode is supported to save power and lengthen standby time -- if there is no operation in more than 3 minutes, the the device will enter sleep mode,RF indicator on.
2. In sleep mode, one random click on the keys can wake up the device.
NOTE：This item has not backlit LED（the Manul may contains something about backlit setting, because this manual is a universal one for two keyboards of this model, one has backlit and the other has not, and the X1 is the one which has not backlit LED )

Care and Maintenance:
1. Do not attempt to disassemble the device and replace battery.
2. Charging time depends on battery capacity, type and charger type. Battery can be charged hundreds or thousands of times.
3. Battery automatically discharges for some specific time if no operation after fully-charged.
4. Do not place the device in extremely hot or cold environment, such as locked car in summer or winter. This will shorten battery life. Please try to keep it in normal temperature. If battery is too hot or too cold, the device may not work even though it is fully-charged. Lithium battery peformance will be affected if the temperature is under zero.